Hydrogen clean
 

Just had a circular from a local garage advertising a"Hydrogen Clean ". Apparently involves some form of cleaning from your air intake through to your exhaust. Supposedly improves flexibility, pollution reduced by 30%, increased fuel economy and better protection for your engine. Anybody ever heard of it? , not that I plan to try it.

Yes and it's bull****
Been talked about alot on VAG forums amongst TFSI owners.
Due to the way a TFSi works it's quite efficient at coking up its intake valves (Google RS4 decoke).
the only true way to decoke is to strip it. The next best thing is a can on Sea Foam.
Anyone offering a service like this is just decoking your wallet

Pretty much what I thought Scott.